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This article in CS

  1. Vol. 14 No. 6, p. 893-895
    Received: Feb 23, 1974

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Cytology and Breeding Behavior of Brachiaria Ruziziensis Germain Et Evrard

  1. J. E. Ferguson and
  2. L. V. Crowder2



The diploid chromosome number of 2n=l8 was recorded in plants from 16 accessions of Brachiaria ruziziensis Germain et Evrard. Meiosis appeared regular and pollen stainability averaged 87%. The female gametophyte was derived from a megaspore and when mature had eight nuclei. Cross-fertilization occurred at a very high frequency under conditions of natural open-pollination. Seed set averaged 21 and 0.4% for open- and self-pollination, respectively, suggesting the operation of a self-incompatibility mechanism. One generation of self-fertilization reduced seedling germination and survival. Significant inbreeding depression for total dry matter production was found in 4 of 6 S, families.

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